How to resolve the declation of TempData[""] in a static field?

Why can''t I use a TempData within a static method?

I'm getting the following error on this line of code :   empData["ss"] = resultsContainer

C# An object reference is required for the non-static field, method, or property

      public static XtraReport BuildReportObject(DailyEmployeeRecapSearchCriteria searchCriteria
            , Models.Employee LoggedInUser
            , System.Globalization.CultureInfo systemCultureInfo
            , ref XtraReport mainReport
            )
        {
            var resultsContainer = xxx.CustomReports.DailyEmployeeRecapService.GetReportResults(searchCriteria, LoggedInUser.CultureInfo, LoggedInUser.ID.Trim());
            resultsContainer.CustomerDetails.Select(s => s.CustomerNumberAndName = s.CustomerNumber.ToString().Trim() + " - " + (s.CustomerFirstNameLastNameOrCompany ?? "").Trim()).ToList();
            resultsContainer.CustomerDetails.Select(s => s.CustomerNumberAndName += (s.NewCustomer ? " - " + Tools.Language.Translate(Language.Keys.New, LoggedInUser.CultureInfo) + "!" : "")).ToList();

            empData["ss"] = resultsContainer

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